Flush bolt.



J. E. MATTHEWS.

FLUSH BOLT.

APPLICATION FILED JAN. 11, 1915.

1,162,?95. Patented Dec. 7, 1915.

VIII/III) WITNESSES: INVEJVTOR.

ill NITF1 %TATE% PATENT @FFIQE.

JAMES E. MATTHEWS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SABGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

FLUSH BOLT.

Application filed January 11, 1915 To all whom it may concern Be it known that I, JAMES E. MATrHEWs, a citizen of the United States, residing in the city and county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Flush Bolts, of which the following is a full, clear, and exact description.

This invention relates to flush bolts, and the primary object of the invention is to provide an improved form of connection between the operating lever or finger-piece and the bolt proper whereby the device is rendered more eflicien-t and its {cost lowered. By my improvements, the number of parts is reduced to a minimum, and yet the device is strong and durable and may be easily operated.

To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing, Figure 1 is a front elevation of a flush bolt embodying my invention, with the bolt proper in its retracted position; 2 is a side elevation of Fig. 1; Fig. 3 is a view similar to Fig. 2, showing the bolt protracted; Fig. 4 is a section on line 4-4 of Fig. 1; Fig. 5 is a rear'view of the device; and Figs. 6 and 7 are enlarged detail sections on line 6-6 of Fig. 5, showing the parts in different positions.

Referring to the drawing, 10 indicates the usual face plate or supporting plate, having the customary longitudinal recess or cutaway portion 11 in which the actuating lever or finger-piece 12 is housed. The bolt 13 operates in an opening in a lip 14: extending laterally from one end of the face plate as usual. The bolt is provided with a shank 15 guided on the rear surface of the face plate between lugs 16 which extend rearwardly from the face plate and are connected by a pin 17. The actuating lever 12 extends rearwardly through the opening 11, and is pivoted on the pin 17. In the form shown, the shank 15 of the bolt is of flattened shape and is adapted to slide against a flat surface at the rear of the face plate, which surface may be formed on a rearwardly projecting boss 18. Intermediate of its ends, the shank 15 is provided with a slot 19 engaged by a cam 20 on the actu- Specification of Letters Patent.

Patented Dec. *7, 1915.

Serial No. 1,844..

ating lever. The cam 20 is of approximately heart-shape and fits the slot 19 rather snugly, as best shown in Fig. 41. That portion of the actuating lever which is pivoted on the pin 17 is provided with a hub 21 adapted to oscillate on the pin 17 between the cheeks or lugs 16. At one end the hub 21 is formed into a cam, which, in the form shown, has two flat surfaces 22 directed at an acute angle to each other, as best shown in Figs. 6 and 7. Either one of these surfaces is adapted to engage a spring 23, which preferably takes the form of a bow of spring wire, the ends of which are set in notches 2a in the face plate, and the intermediate portion of which is in engagement with the cam portion on the hub of the actuating lever.

The operation of the device will be obvious for the most part from the foregoing de scription. It will be obvious that when the parts are in the position shown in Fig. 4:, the bolt 13 will be prevented from downward movement by the engagement of the upper margin 25 of slot 19 with the shoulder 26 presented by the heartshaped cam 20, whereas movement in an upward direction is prevented by engagement of the lower margin 27 of slot 19 with the shoulder 29 presented by the heart-shaped'cam. The shoulder 26 is located at one side of the actuating lever and close to the pivot, while the shoulder 28 is at the other side of the actuating lever and farther from the pivot. In this position of the parts, the actuating lever is held firmly in position by the spring 23, the intermediate portion of which bears against one of the surfaces 22 on the hub of the lever, as shown in Fig. 6. The bolt can be protracted by raising the actuating lever from the position shown in Fig. 1 to that shown in Fig. 3. During this operation, the spring 28 is compressed by a nose 22 on the hub 21 intermediate the two flat surfaces 22, as shown in Fig. 7, and then as the actuating lever passes upward beyond the dead center, the bolt is immediately snapped into its fully protracted position, as will be obvious. In this position, the other flat surface 22 on the hub 21 bears against the spring and the bolt is deadlocked against movement by the margins 25, 27 of the slot 19 bearing against shoulders on the cam 20, which are similar to the shoulders 26, 28 respectively but located oppositely with respect thereto, as will be apparent. a

1 Various changes in the details of the construction may be adopted, Without departing from the scope of the invention as defined in the claims.

What I claim is:

1. Ina flush bolt, the combination of a supporting plate having a slot, a bolt guided lengthwise on the supporting plate and likewise having a slot, an actuating lever passing through both of said slots and having one end accessible at the front of the supporting plate, means for pivoting the other end of said actuating lever to the supportingplate at the rear of the bolt, and a cam on the intermediate portion of said lever fitting the slot in the bolt and adapted to lock the latter against movement in either direction when the bolt is in its protracted position or in its retracted position; substantially as described.

2. In a flush bolt, the combination of a supporting plate having a slot, a bolt guided lengthwise on said supporting plate at the rear thereof and likewise having a slot, an actuating lever passing through both of said slots and having a manipulating end accessible at the front of said supporting plate, means for pivoting the other end of the actuating lever to the supporting plate at the rear of the bolt, a spring engaging the pivoted end of the actuating lever to hold the latter in either of two positions, and a cam on the intermediate portion of the lever engaging the slot in'the bolt and adapted to lock the bolt against movement in either direction when said lever occupies either of the positions in which it is held by said springs; substantially as described.

3. In a flush bolt, the combination of a supporting plate having a slot and provided with lugs projecting rearwardly on opposite sides of said slot, a bolt guided on said supporting plate at the rear thereof between said lugs, said bolt also having a slot, a pin extending between said lugs, an actuating lever swiveled to said lugs by means of said pin and extending forwardly through the slot in the bolt into the slot in the supporting 7 plate, and a cam on said lever closely fitting the slot in the bolt; substantially as described.

4:. In a flush bolt, the combination of a supporting plate having a slot and provided with rearwardly projecting lugs at opposite sides of said slot, a bolt having a flattened portion guided on the rear surface of said supporting plate and provided with a slot, a pin extending between said lugs at the rear of the bolt, an actuating lever extending through said slot and having a hub portion journaled between said lugs by means of said pin, and a spring bearing on said hub portion to hold the actuating lever in either of two positions corresponding to the fully protracted and fully retracted positions respectively of the bolt; substantially as described.

5. In a flush bolt, the combination of a supporting plate having lugs, a pin connecting said lugs, a lever having a hub portion pivoted on said pin between said lugs, a bolt connected with said lever, a cam portion on one end of said hub, and a spring engaging said cam portion; substantially as described.

6. In a flush bolt, the combination of a supporting plate having lugs, a pin c0nnecting said lugs, a leverhaving a hub portion pivoted on said pin between said lugs, a bolt connected with said lever, a cam portion on one end of said hub, and a bow spring interposed between said hub and the body of the supporting plate, and engaging said cam portion; substantially as described.

In witness whereof, I have hereunto set my hand on the 8th day of January, 1915. JAMES E. MATTI-IEIVS. I/Vitnesses:

ADELE M. LONGSTEIN, HELEN F. STAHNKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

